Goddess of the rainbow and divine messenger
As Goddess of the rainbow Iris joined the human realm to the place of the Gods. She restored calm and balance to the forces of nature after a storm.
Iris was the daughter of Thaumas, one of the minor sea gods, and the Oceanid Electra. Her sisters were the Harpies, Aello, and Ocypete. She also had a twin sister, Arke, who served as messenger for the Titans in the Titanomachy war and was thrown into Tartarus with her masters by Zeus after ripping her wings off. Iris once saved her siblings from death. The Harpies were loathsome winged female creatures who daily would swoop down and eat and befoul the food of the blind seer Phineus. When the Argonauts Calais and Zetes, winged sons of the North Wind, Boreas, caught up with the Harpies and were about to kill them, Iris appeared and beseeched the sons of Boreas to spare the lives of the Harpies. She promised that if they let them live, the Harpies would never again bother Phineus.
One of her tasks is to deliver the sacred water of Styx. When quarrel arises among the gods, and when anyone among the Olympians lies, then Zeus sends Iris to the river Styx in the Underworld to bring in a golden jug the oath of the gods. Zeus caused oaths to be sworn by the water of Styx. If any of the gods drinks of her water and is untrue, he/she lies breathless for a year, never tastes Ambrosia and Nectar and lies down spiritless and voiceless. After spending thus one year in sickness he/she is cut off for nine years from the gods' councils and feasts and cannot return until the tenth year. In Homer's Iliad, Zeus sent Iris with a message for King Priam of Troy, instructing him to secretly come to the enemy Greek ships and, with the help of gifts, persuade Achilles to give up the body of Priam's son Hector, whom Achilles had slain in battle. Iris also was the one who delivered the bad news to the jilted husband Menelaus that Paris had ran away with his wife, Helen, which started the Trojan War. Hera sent Iris flying to the island of Crete with news of the elopement, prompting Menelaus to raise an army and invade Troy.
Speaking of bad news, at the request of Hera, Iris also came to Hypnos, the god of Sleep, to ask him to fashion a shape resembling Ceyx, which appearing before Ceyx's wife Alcyone, would inform her of her husband's death. He had drowned and Alcyone didn't know it. Before Zeus sent a flood to punish some evil humans, he destroyed their crops with the help of Iris. Zeus shut the North Wind (Boreas) up in the cave of Aeolus and let the wet and rainy South Wind (Notus) loose. Meanwhile Iris drew up water feeding it to the clouds. By way of this method all crops were destroyed, and the work of a whole year amounted to nothing. In Greek mythology, Iris is the personified goddess of the rainbow. She is regarded as the messenger of the gods to humankind, and particularly of the goddess Hera whose orders she brought to humans. She is able to change shapes and when delivering messages to mortals Iris assumes the appearance of a mortal known to those who receive the message.
Free Spirited - Iris was a free spirit. She is a strictly non-violent goddess who only attacks in self-defense.
Altruistic - She is also upset that living a life for others (by delivering messages for others) has left her with no identity, as there are no shrines to her or a sacred animal.
Sacred Symbols and Animals
Rainbow - Iris is the personification of the rainbow. As the sun unites Earth and heaven, Iris links the gods to humanity.
The caduceus - The caduceus is a symbol of healing and divine communication.
Wings - Often depicted as a winged Goddess, holding a pitcher full of nectar.
Iris flower - The flower the Iris was named after her.
None of this information belongs to me or has been written by me, expect for the casting face claim. The information collected belongs to these sources:
Greek Mythology Wikia/Iris
Camp Half blood Wiki/Iris
Goddess - Guide/Iris